Problem with Imported FBX Object Interaction

[yutaka-red]

Dear All

I have been following the Interaction Manager manual and succeeded in creating interaction with a Cube.

However, when I import an FBX object into the same environment and adding the same settings to the FBX objects (ie, Interaction Manager, Box Collider, rigid Body, Interaction Scripts etc, the FBX object would not react like the Cube.

In short, when I touch the FBX, it jumps off very quickly and stays in one position thereafter.

I have attached the Exported Package herewith for your reference.
Pls visit Dropbox:
https://www.dropbox.com/s/cdoiqmlplxafk5q/Bottle%20Question.unitypackage?dl=0

[edit: I added a link to the file so that your login isn't exposed -- which is insecure for everybody]

I would be most grateful if anyone can please kindly help me to point out what is missing in my steps.

Very grateful for any help at all

Regards
Yutaka

[Joe_Ward]

You seem to have added rigid bodies, colliders, and InteractionBehaviours to every sub-object within the "bottle" object. In Unity, Rigidbodies cannot be children of other objects that contain Rigidbodies. The Interaction Engine also follows this rule, InteractionBehaviours cannot be children of other objects containing nteractionBehaviours. That is why your object is exploding when you try to pick it up.

The other problem is that your top-level collider is nowhere near the visual object it is for. This is probably because of the large plane mesh exported with the FBX file. Even though you remove it in the scene, it has the effect of putting the object center far away from the bottle. When you add the collider, it ends up far away. You can avoid this by dragging the "bottle" out from "bottle report fix" and using that as the root object.

[yutaka-red]

Dear Joe

Thank you so much for your help, I think I am almost there. Now that I can interact with the bottle and the mouse ( except the bottle cap flies off whenever I place my hands) I am left a few fine tuning problems which are very similar in both files( pls see my Dropbox)

The problems for both files Are as follows:

1. I am not able to catch the object

2. Both objects will spin after I touch them. My desired result is to hold them in a stable position with the hands, in case of the bottle: as a product design demo for taking cap off and putting back on again, in case of the mouse: to let it dance in or on my hands.

3. I am able to punch through the objects ( not desired) as if they were transparent even though Box collider were applied ( assume Box Collider is the only supported collider).

I have uploaded the 2 files to my drop box again . I would be very grateful if you could kindly help me to resolve these issues.

Thank you so much for your guidance. Sincerely

Yutaka

Dropbox login: yutakastarz@gmail.comyutakastarz@gmail.com Password: yutaka

[Joe_Ward]

1 & 2. I suspect these are the same issue. The way the object was created/imported, the center was not at the objects visual center. I suspect this causes the Interaction Engine to actually twist the object out of the hand when it is trying to move the object into the grip position.

There is a provision for creating special cases for holding an object when the standard methods don't work. This requires writing fairly detailed code for how you want an object positioned in the hand and how it should move to that position when grasped.

1. This is as designed. If an object can't move, either because it is set as kinematic or because it is blocked by another immovable object, then the hands will pass through it. The alternative is what you get without using the Interaction Engine, namely Unity's normal rigid body physics. This leads to "explosive" reactions when the physics simulation is unable to move objects apart. It would also require quite a different hand animation system than we support.

[Doomach]

Hi all, I don't want to start the new topic since I have the same problem as posted here. I imported the .stp (step) file in Unity, added the Interaction Behaviour script to the object, tried a different type of collider and the problem still exist, I just can't grab the object normal way like I can do with the cube or other primitive objects.

The object starts to spin, or if not, I am not even able to catch it the normal way (it shakes).

Is there any solution to this problem or I should try to solve it with the different type of script, if possible?